<!DOCTYPE html>
<html lang="cn">
<head>
    <meta charset="UTF-8">
    <title>Base</title>
</head>
<body>
<div>
    <p>朝辞白帝彩云间</p>
    <p>千里江陵一日还</p>

    {% block mainbody %}
       <p>original</p>
    {% endblock %}
        <p>两岸猿声啼不住</p>
    <p>轻舟已过万重山</p>
</div>
</body>
</html>